Investigation of compound and direct-semidirect interference effects in the /sup 89/Y(n,. gamma. /sub 0/+. gamma. /sub 1/)/sup 90/Y reaction

Conference · Tue Jan 15 04:00:00 EST 1985 · AIP Conf. Proc.; (United States)

OSTI ID:5640932

Joly, S

The partial radiative capture cross section of the /sup 89/Y(n,..gamma../sub 0/+..gamma../sub 1/)/sup 90/Y reaction was analyzed to look for possible interference effects between compound-nucleus (CN) and direct-semidirect (DSD) processes in the capture reaction. The contribution of these mechanisms has first to be estimated as well as possible. The SPRT method has been used to get the optical potential representing the interaction of protons and neutrons with /sup 89/Y. A good overall agreement is found between the measured and the calculated compound, nucleus (inelastic and capture) cross sections. A good agreement is also found for the capture cross section in the giant dipole resonance (GDR) region using the complex isovector potential we have deduced and a volume type coupling of the incident neutron to the GDR. As the sum of the CN and DSD contributions accounts for the observed cross section in the 3--7 MeV energy region, it is concluded that the interference effects should be small as confirmed by estimates.

• Research Organization: Service de Physique Neutronique et Nucleaire, B.P. n 12, 91680 Bruyeres-le-Chatel, France
• OSTI ID: 5640932
• Report Number(s): CONF-840906-
• Conference Information: Journal Name: AIP Conf. Proc.; (United States) Journal Volume: 125:1
• Country of Publication: United States
• Language: English

Related Subjects

653003* -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CAPTURE
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
HADRON REACTIONS
IONIZING RADIATIONS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
OPTICAL MODELS
RADIATIONS
TARGETS
YTTRIUM 89 TARGET